1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d9d7452a0ebfb4f2ea209c7a9aa79033c54446a26f9bca423b8f137922d778. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ac15b72-3b09-4adb-b268-290ab5a2fc09.json and https://artists.proofprofile.net/proofs/artist/2ac15b72-3b09-4adb-b268-290ab5a2fc09.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dc5ad9dfad4669b56cf710fef6fa258c8019b5ff2fb11b2829a9370e3245c4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAIF2444356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0a767ee8659419ba204a44e690d98143f3739c82a9513dbf9388025337c581. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:59:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFF2416942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e871b9eb40646f076a9a95eba688ab62bbf6ba32723acf1e656144ff0f42504. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJI2506369.
A Disciple's Lament (I Wish I'd Been There)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85be90c0dd25e9daa3042809745228d24035c78e6bd396980f75018fde411088. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJL2587706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43605c5483a0200ac723ced41866622fb392feae8e708c1f953c83cb94ef17e1. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:40:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAKA2503550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74639df331fb6ffa4a895764d709399214d68241ae487f5aa63e67e58ec8892d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3F22599066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2757233d72181dba7f9397119af2bb740885da371ac498bb3967fcd25e3324d. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3F22599067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98de8be124e41284ee703a9d1b6b0cbe7794697eab56ccc6976a838b191564f1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3F22599068.